EP0256003A1 - Process for converting a thermoplastic polymer into spheroidal agglomerated granules. - Google Patents
Process for converting a thermoplastic polymer into spheroidal agglomerated granules.Info
- Publication number
- EP0256003A1 EP0256003A1 EP86901219A EP86901219A EP0256003A1 EP 0256003 A1 EP0256003 A1 EP 0256003A1 EP 86901219 A EP86901219 A EP 86901219A EP 86901219 A EP86901219 A EP 86901219A EP 0256003 A1 EP0256003 A1 EP 0256003A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- granules
- tube
- steam
- range
- suspension
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/18—Evaporating by spraying to obtain dry solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
- B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/08—Making granules by agglomerating smaller particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/10—Making granules by moulding the material, i.e. treating it in the molten state
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/14—Powdering or granulating by precipitation from solutions
Definitions
- This invention is directed to a process for converting a thermoplastic polymer in a solution of a volatilizable organic solvent into a plurality of essentially spheroidal agglomerated granules of rela- tively uniform sizes.
- the process of this invention comprises:
- Fig. 5 is a cross section view of the steam precipitator taken on line 5-5 of Fig. 6.
- Fig. 6 is an end view of the steam precipitator.
- the steam precipitator 14 is provided with an inner body 40 which is adjustable with respect to the outer body 38 by means of one or more shims 42. Fasten- ing means such as bolts and nuts 44 are provided to keep the assembly together. By means of the shims 42 a proper spacing between the conical bevel 56 and the conical seat 58 is provided which will give a thin sheet of superheated steam at the proper velocity to break up the stream of polymer into fine particles. 637 - ' °- ⁇ PCT/US86/00192
- the granules are oblate spheriods and some are rather like flat pebbles but the majority appear to be essentially spheroidal.
- An important feature of this invention is that the granules are of an essentially uniform size range or mesh range with very little dust or powder.
- the granules are carried by the gas stream into a conventional cyclone separator wherein the organic solvent vapor and water vapor are taken over ⁇ head for recovery of the solvent by condensation.
- the granules are removed from the bottom and are further processed by mechanical indirect steam dryers to remove residual water and solvent before being processed in a conventional vented extruder and chopper to achieve polycarbonate pellets of suitable purity for molding and/or sale.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
Des polymères thermoplastiques en solution dans des solvants organiques sont convertis en granules de granulométrie relativement uniforme et répartis sur une plage étroite, en faisant passer la solution de polymère à travers un ajutage à jets (52) pour former un courant à haute vitesse, en injectant de la vapeur surchauffée dans le courant à haute vitesse pour former une suspension de fines particules de polymères dans un courant gazeux, en faisant passer la suspension dans un tube d'agglomération (16) à serpentin uniformément chauffé possédant une série d'au moins six courbures semi-circulaires (32, 34) où les particules s'agglomèrent essentiellement complètement en granules et les granules sont séparés du courant gazeux.Thermoplastic polymers in solution in organic solvents are converted into granules of relatively uniform particle size and distributed over a narrow range, passing the polymer solution through a jet nozzle (52) to form a high speed stream, injecting superheated steam in the high speed stream to form a suspension of fine polymer particles in a gas stream, passing the suspension through a uniformly heated coil agglomeration tube (16) having a series of at least six semicircular curvatures (32, 34) where the particles essentially agglomerate completely into granules and the granules are separated from the gas stream.
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US29209381A | 1981-08-12 | 1981-08-12 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0256003A1 true EP0256003A1 (en) | 1988-02-24 |
EP0256003A4 EP0256003A4 (en) | 1988-03-22 |
EP0256003B1 EP0256003B1 (en) | 1991-04-17 |
Family
ID=23123187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86901219A Expired - Lifetime EP0256003B1 (en) | 1981-08-12 | 1986-01-31 | Process for converting a thermoplastic polymer into spheroidal agglomerated granules |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0256003B1 (en) |
KR (1) | KR930006391B1 (en) |
AU (1) | AU574268B2 (en) |
CA (1) | CA1217615A (en) |
WO (1) | WO1987004637A1 (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2090605A1 (en) | 2008-02-13 | 2009-08-19 | Bayer MaterialScience AG | Method for making polycarbonates |
DE102008008841A1 (en) | 2008-02-13 | 2009-08-20 | Bayer Materialscience Ag | Preparing (co)polycarbonate or diaryl carbonate, useful in e.g. sunglasses, comprises converting di-, mono-phenol and phosgene to chloroformic acid aryl ester, oligo- or diaryl-carbonate, and reacting the product under alkaline solution |
DE102008008842A1 (en) | 2008-02-13 | 2009-08-27 | Bayer Materialscience Ag | Alkylphenol for molecular weight adjustment and polycarbonate compositions having improved properties |
EP2096131A1 (en) | 2008-02-27 | 2009-09-02 | Bayer MaterialScience AG | Method for making polycarbonate |
EP2098553A1 (en) | 2008-03-05 | 2009-09-09 | Bayer MaterialScience AG | Method of manufacturing polycarbonate using the phase boundary method |
DE102008023800A1 (en) | 2008-05-15 | 2009-11-19 | Bayer Materialscience Ag | Alkyl phenol for molecular weight adjustment and copolycarbonate with improved properties |
DE102009059990A1 (en) | 2009-12-22 | 2011-07-07 | Bayer MaterialScience AG, 51373 | Process for the device for producing polycarbonate |
US9771451B2 (en) | 2014-01-24 | 2017-09-26 | Covestro Deutschland Ag | Method for producing polycarbonate according to the phase interface method |
WO2019121248A1 (en) | 2017-12-18 | 2019-06-27 | Covestro Deutschland Ag | Method for producing a polycarbonate using an organic solvent based on chlorinated hydrocarbons |
EP3719052A1 (en) | 2019-04-03 | 2020-10-07 | Covestro Deutschland AG | Method for the preparation of polycarbonate with reduced phosgen excess |
EP3719051A1 (en) | 2019-04-03 | 2020-10-07 | Covestro Deutschland AG | Method for the preparation of the polycarbonate addition time of the chain breaking agent |
EP3985047A1 (en) | 2020-10-13 | 2022-04-20 | Covestro Deutschland AG | Method for the preparation of a polycarbonate based on the interfacial process with solvent exchange |
EP4083106A1 (en) | 2021-04-30 | 2022-11-02 | Covestro Deutschland AG | Method for the preparation of polycarbonate with improved sustainability |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0616002B1 (en) * | 1992-09-18 | 1998-03-04 | Idemitsu Petrochemical Co., Ltd. | Process for producing polycarbonate powder |
JP2514304B2 (en) * | 1993-08-04 | 1996-07-10 | 出光石油化学株式会社 | Polymer-granular body and method for producing the same |
DE69417870T2 (en) * | 1993-09-21 | 2000-01-20 | Teijin Chemicals Ltd | AROMATIC POLYCARBONATE RESIN PARTICLE AND METHOD FOR PRODUCING THE SAME |
US5760160A (en) * | 1993-09-21 | 1998-06-02 | Teijin Chemicals Ltd. | Aromatic polycarbonate resin granule |
US9127132B2 (en) * | 2013-10-08 | 2015-09-08 | Katon Polymers U.S. LLC | Process for coagulating sulfonated block copolymers |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3508339A (en) * | 1965-11-30 | 1970-04-28 | Gen Electric | Drying apparatus and process |
IT1094162B (en) * | 1978-02-22 | 1985-07-26 | Montedison Spa | CONTINUOUS PROCESS FOR THE RECOVERY OF POLYCARBONATE FROM ITS SOLUTIONS |
-
1986
- 1986-01-31 WO PCT/US1986/000192 patent/WO1987004637A1/en active IP Right Grant
- 1986-01-31 AU AU54507/86A patent/AU574268B2/en not_active Ceased
- 1986-01-31 KR KR1019870700891A patent/KR930006391B1/en not_active IP Right Cessation
- 1986-01-31 EP EP86901219A patent/EP0256003B1/en not_active Expired - Lifetime
- 1986-02-03 CA CA000500992A patent/CA1217615A/en not_active Expired
Non-Patent Citations (2)
Title |
---|
No relevant documents have been disclosed. * |
See also references of WO8704637A1 * |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2090605A1 (en) | 2008-02-13 | 2009-08-19 | Bayer MaterialScience AG | Method for making polycarbonates |
DE102008008841A1 (en) | 2008-02-13 | 2009-08-20 | Bayer Materialscience Ag | Preparing (co)polycarbonate or diaryl carbonate, useful in e.g. sunglasses, comprises converting di-, mono-phenol and phosgene to chloroformic acid aryl ester, oligo- or diaryl-carbonate, and reacting the product under alkaline solution |
DE102008008842A1 (en) | 2008-02-13 | 2009-08-27 | Bayer Materialscience Ag | Alkylphenol for molecular weight adjustment and polycarbonate compositions having improved properties |
US7863403B2 (en) | 2008-02-13 | 2011-01-04 | Bayer Materialscience Ag | Process for the preparation of polycarbonates and diaryl carbonate |
EP2096131A1 (en) | 2008-02-27 | 2009-09-02 | Bayer MaterialScience AG | Method for making polycarbonate |
DE102008011473A1 (en) | 2008-02-27 | 2009-09-03 | Bayer Materialscience Ag | Process for the production of polycarbonate |
EP2098553A1 (en) | 2008-03-05 | 2009-09-09 | Bayer MaterialScience AG | Method of manufacturing polycarbonate using the phase boundary method |
DE102008012613A1 (en) | 2008-03-05 | 2009-09-10 | Bayer Materialscience Ag | Process for the preparation of polycarbonate by the interfacial process |
DE102008023800A1 (en) | 2008-05-15 | 2009-11-19 | Bayer Materialscience Ag | Alkyl phenol for molecular weight adjustment and copolycarbonate with improved properties |
EP2343328A1 (en) | 2009-12-22 | 2011-07-13 | Bayer MaterialScience AG | Method and device for producing polycarbonate |
DE102009059990A1 (en) | 2009-12-22 | 2011-07-07 | Bayer MaterialScience AG, 51373 | Process for the device for producing polycarbonate |
US8394912B2 (en) | 2009-12-22 | 2013-03-12 | Bayer Materialscience Ag | Process and apparatus for the preparation of polycarbonate |
US9771451B2 (en) | 2014-01-24 | 2017-09-26 | Covestro Deutschland Ag | Method for producing polycarbonate according to the phase interface method |
WO2019121248A1 (en) | 2017-12-18 | 2019-06-27 | Covestro Deutschland Ag | Method for producing a polycarbonate using an organic solvent based on chlorinated hydrocarbons |
EP3719052A1 (en) | 2019-04-03 | 2020-10-07 | Covestro Deutschland AG | Method for the preparation of polycarbonate with reduced phosgen excess |
EP3719051A1 (en) | 2019-04-03 | 2020-10-07 | Covestro Deutschland AG | Method for the preparation of the polycarbonate addition time of the chain breaking agent |
WO2020201180A1 (en) | 2019-04-03 | 2020-10-08 | Covestro Intellectual Property Gmbh & Co. Kg | Process for producing polycarbonate using a reduced phosgene excess |
WO2020201179A1 (en) | 2019-04-03 | 2020-10-08 | Covestro Intellectual Property Gmbh & Co. Kg | Process for producing polycarbonate - time of addition of the chain terminator |
EP3985047A1 (en) | 2020-10-13 | 2022-04-20 | Covestro Deutschland AG | Method for the preparation of a polycarbonate based on the interfacial process with solvent exchange |
EP4083106A1 (en) | 2021-04-30 | 2022-11-02 | Covestro Deutschland AG | Method for the preparation of polycarbonate with improved sustainability |
WO2022229245A1 (en) | 2021-04-30 | 2022-11-03 | Covestro Deutschland Ag | Process for producing polycarbonate with improved sustainability |
Also Published As
Publication number | Publication date |
---|---|
EP0256003A4 (en) | 1988-03-22 |
AU574268B2 (en) | 1988-06-30 |
CA1217615A (en) | 1987-02-10 |
KR880700682A (en) | 1988-04-11 |
EP0256003B1 (en) | 1991-04-17 |
KR930006391B1 (en) | 1993-07-14 |
WO1987004637A1 (en) | 1987-08-13 |
AU5450786A (en) | 1987-08-25 |
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